随着汽车工业的飞速发展，自动变速箱已经广为人知，包括AT、DSG、CVT等，虽然大家对变速箱的养护意识都普遍提高，但在实际使用当中还是会出现一些不正常现象，严重的影响了驾驶体验。下面就常见的自动变速箱异响的原因进行简要分析。

　　With the rapid development of the automotive industry, automatic transmissions have become widely known, including AT, DSG, CVT, etc. Although people's awareness of gearbox maintenance has generally increased, some abnormal phenomena still occur in actual use, seriously affecting the driving experience. Below is a brief analysis of the common causes of abnormal noises in automatic transmissions.

　　变扭器异响

　　Abnormal noise from the torque converter

　　大多数变扭器是由泵轮、涡轮导轮和锁止离合器组成的，动力输出是涡轮，但有一部分自动变速箱采用分流式变扭器，动力输出除了涡轮外，还有泵轮。自动变速箱体内一个离合器总成直接和变扭器的外盖刚性连接，它随着发动机一起旋转。

　　Most torque converters are composed of pump wheels, turbine guide wheels, and lock up clutches, with the power output being the turbine. However, some automatic transmissions use split torque converters, with the power output being not only the turbine but also the pump wheels. A clutch assembly inside the automatic transmission is rigidly connected to the outer cover of the torque converter, and it rotates together with the engine.

　　因为在P档和N档时，整个变扭器一起在旋转，异响很有可能在这些档位中不存在，但自动变速箱入其他档位时踩死刹车，车轮固定不动，变扭器涡轮将固定不动，这时变扭器的涡轮和外盖之间的轴承将工作。若异响在这些档位中出现，但又不存在于N、P档，这是应该检查变扭器。另外，变扭器异响很有可能随着车子的起步慢慢变小，到平稳行驶时，变扭器内部元件没有相对运动，异响可能消失。

　　Because in P and N gears, the entire torque converter rotates together, and abnormal noise is likely not present in these gears. However, when the automatic transmission enters other gears, if the brake is pressed and the wheels are fixed, the torque converter turbine will be fixed. At this time, the bearings between the torque converter turbine and the outer cover will work. If abnormal noise occurs in these gears but does not exist in N or P gears, the torque converter should be checked. In addition, the abnormal noise of the torque converter is likely to gradually decrease with the start of the car. When driving smoothly, the internal components of the torque converter do not move relative to each other, and the abnormal noise may disappear.

　　油泵异响

　　Abnormal noise from oil pump

　　油泵异响随着压力的变化而变化。这时把自动变速箱所在的档位全部挂完，并相应改变其发动机转速，如果异响一直存在的话，可以排除传动机构上的元件产生异响。

　　The abnormal noise of the oil pump varies with the change of pressure. At this point, shift all gears of the automatic transmission and change its engine speed accordingly. If the abnormal noise persists, it can be ruled out that the components on the transmission mechanism are producing abnormal noise.

　　在检查油泵之前，可以通过一些测试来判断，调节主油压，如果异响随着主油压变化而变化，那时说明油泵有故障。油泵的异响也可能是由于油格堵塞造成的，可以用油压表来盘点这种类型的问题，如果是油格堵塞而造成的油泵异响，挡负荷增加引起油压增加时，油压表的指针将会波动很大，起伏不定。

　　Before checking the oil pump, some tests can be conducted to determine and adjust the main oil pressure. If the abnormal noise changes with the main oil pressure, it indicates that the oil pump has a fault. The abnormal noise of the oil pump may also be caused by the blockage of the oil grid. This type of problem can be checked with an oil pressure gauge. If the abnormal noise of the oil pump is caused by the blockage of the oil grid, and the increase in gear load leads to an increase in oil pressure, the pointer of the oil pressure gauge will fluctuate greatly and fluctuate.

　　行星系异响

　　Planetary system noise

　　这种类型的异响往往和档位有着密切的关系，档位的变换是通过改变不同的输入元件和固定元件，得到不同的输出，不同的传动比获得。两个同方向、同速度，没有相对运动的元件不会产生异响。

　　This type of abnormal noise is often closely related to the gear, and the gear change is achieved by changing different input and fixed components to obtain different outputs and transmission ratios. Two components with the same direction, speed, and no relative motion will not produce abnormal noise.

　　在3档，自动变速箱传动比是1:1，整个行星系没有相当于运动的元件，然而，这种异响在3档将会消失，在其他档位，整个行星系的元件将产生相当对运动，异响通常在这些档位出现。也就是说，行星系异响和单位有关行。

　　In third gear, the automatic transmission ratio is 1:1, and there are no components equivalent to motion in the entire planetary system. However, this abnormal noise will disappear in third gear, and in other gears, the components of the entire planetary system will produce significant motion. Abnormal noise usually occurs in these gears. That is to say, the abnormal noise of planetary systems is related to the unit.

　　差速器异响

　　Differential abnormal noise

　　差速器连接的是半轴/车轮，这种异响随着车速的变化而变化，它并不受发动机转速和档位的影响，仅仅受到车速的影响。另外，安装问题也会造成主减速器异响。差速器异响。

　　The differential is connected to the half axle/wheel, and this abnormal noise varies with the speed of the vehicle. It is not affected by the engine speed and gear, but only by the speed of the vehicle. In addition, installation issues can also cause abnormal noise from the main reducer. Differential abnormal noise.

　　异响的常见原因

　　Common causes of abnormal noise

　　1、自动变速箱进水后没有及时维修，会引发一系列自动变速箱故障。如：漏油、异响、冲击等故障。2、长期不更换自动变速箱油，自动变速箱油会变浓，长期使用会使其失去功效，各部件之间没有保护层而直接摩擦，从而加剧机械零件的磨损，严重时损坏自动变速箱行星架、差速器等元件，从而出现异响。3、使用了劣质变速箱油，低品质或假冒的变速箱油，抗温能力差，容易产生氧化，造成油泥和油渣，堵塞自动变速箱滤网和润滑油道，造成自动变速箱内部元件的摩擦增大，出现异响故障。

　　1. Failure to repair the automatic transmission in a timely manner after water ingress can lead to a series of automatic transmission failures. Such as oil leakage, abnormal noise, impact and other faults. 2. If the automatic transmission oil is not replaced for a long time, the automatic transmission oil will become thicker, and long-term use will cause it to lose its effectiveness. There is no protective layer between the components and direct friction occurs, which exacerbates the wear of mechanical parts. In severe cases, it can damage the automatic transmission planetary carrier, differential and other components, resulting in abnormal noise. 3. The use of low-quality or counterfeit transmission oil has poor temperature resistance and is prone to oxidation, causing sludge and oil residue, blocking the automatic transmission filter and lubricating oil passage, resulting in increased friction of internal components of the automatic transmission, and causing abnormal noise faults.

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